// SPDX-License-Identifier: GPL-2.0
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/*
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* FPGA Bridge Driver for FPGA Management Engine (FME)
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*
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* Copyright (C) 2017-2018 Intel Corporation, Inc.
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*
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* Authors:
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* Wu Hao <hao.wu@intel.com>
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* Joseph Grecco <joe.grecco@intel.com>
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* Enno Luebbers <enno.luebbers@intel.com>
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* Tim Whisonant <tim.whisonant@intel.com>
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* Ananda Ravuri <ananda.ravuri@intel.com>
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* Henry Mitchel <henry.mitchel@intel.com>
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*/
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#include <linux/module.h>
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#include <linux/fpga/fpga-bridge.h>
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#include "dfl.h"
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#include "dfl-fme-pr.h"
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struct fme_br_priv {
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struct dfl_fme_br_pdata *pdata;
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struct dfl_fpga_port_ops *port_ops;
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struct platform_device *port_pdev;
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};
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static int fme_bridge_enable_set(struct fpga_bridge *bridge, bool enable)
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{
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struct fme_br_priv *priv = bridge->priv;
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struct platform_device *port_pdev;
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struct dfl_fpga_port_ops *ops;
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if (!priv->port_pdev) {
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port_pdev = dfl_fpga_cdev_find_port(priv->pdata->cdev,
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&priv->pdata->port_id,
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dfl_fpga_check_port_id);
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if (!port_pdev)
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return -ENODEV;
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priv->port_pdev = port_pdev;
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}
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if (priv->port_pdev && !priv->port_ops) {
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ops = dfl_fpga_port_ops_get(priv->port_pdev);
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if (!ops || !ops->enable_set)
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return -ENOENT;
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priv->port_ops = ops;
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}
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return priv->port_ops->enable_set(priv->port_pdev, enable);
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}
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static const struct fpga_bridge_ops fme_bridge_ops = {
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.enable_set = fme_bridge_enable_set,
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};
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static int fme_br_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct fme_br_priv *priv;
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struct fpga_bridge *br;
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priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
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if (!priv)
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return -ENOMEM;
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priv->pdata = dev_get_platdata(dev);
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br = devm_fpga_bridge_create(dev, "DFL FPGA FME Bridge",
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&fme_bridge_ops, priv);
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if (!br)
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return -ENOMEM;
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platform_set_drvdata(pdev, br);
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return fpga_bridge_register(br);
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}
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static int fme_br_remove(struct platform_device *pdev)
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{
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struct fpga_bridge *br = platform_get_drvdata(pdev);
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struct fme_br_priv *priv = br->priv;
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fpga_bridge_unregister(br);
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if (priv->port_pdev)
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put_device(&priv->port_pdev->dev);
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if (priv->port_ops)
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dfl_fpga_port_ops_put(priv->port_ops);
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return 0;
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}
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static struct platform_driver fme_br_driver = {
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.driver = {
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.name = DFL_FPGA_FME_BRIDGE,
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},
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.probe = fme_br_probe,
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.remove = fme_br_remove,
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};
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module_platform_driver(fme_br_driver);
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MODULE_DESCRIPTION("FPGA Bridge for DFL FPGA Management Engine");
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MODULE_AUTHOR("Intel Corporation");
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MODULE_LICENSE("GPL v2");
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MODULE_ALIAS("platform:dfl-fme-bridge");
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